linux/net/bridge
Yong Wang 6c131043ea net: bridge: mcast: update multicast contex when vlan state is changed
When the vlan STP state is changed, which could be manipulated by
"bridge vlan" commands, similar to port STP state, this also impacts
multicast behaviors such as igmp query. In the scenario of per-VLAN
snooping, there's a need to update the corresponding multicast context
to re-arm the port query timer when vlan state becomes "forwarding" etc.

Update br_vlan_set_state() function to enable vlan multicast context
in such scenario.

Before the patch, the IGMP query does not happen in the last step of the
following test sequence, i.e. no growth for tx counter:
 # ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 mcast_vlan_snooping 1 mcast_querier 1 mcast_stats_enabled 1
 # bridge vlan global set vid 1 dev br1 mcast_snooping 1 mcast_querier 1 mcast_query_interval 100 mcast_startup_query_count 0
 # ip link add name swp1 up master br1 type dummy
 # sleep 1
 # bridge vlan set vid 1 dev swp1 state 4
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
1
 # sleep 1
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
1
 # bridge vlan set vid 1 dev swp1 state 3
 # sleep 2
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
1

After the patch, the IGMP query happens in the last step of the test:
 # ip link add name br1 up type bridge vlan_filtering 1 mcast_snooping 1 mcast_vlan_snooping 1 mcast_querier 1 mcast_stats_enabled 1
 # bridge vlan global set vid 1 dev br1 mcast_snooping 1 mcast_querier 1 mcast_query_interval 100 mcast_startup_query_count 0
 # ip link add name swp1 up master br1 type dummy
 # sleep 1
 # bridge vlan set vid 1 dev swp1 state 4
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
1
 # sleep 1
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
1
 # bridge vlan set vid 1 dev swp1 state 3
 # sleep 2
 # ip -j -p stats show dev swp1 group xstats_slave subgroup bridge suite mcast | jq '.[]["multicast"]["igmp_queries"]["tx_v2"]'
3

Signed-off-by: Yong Wang <yongwang@nvidia.com>
Reviewed-by: Andy Roulin <aroulin@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2025-04-23 13:02:20 +01:00
..
netfilter netfilter: nf_tables: replace deprecated strncpy with strscpy_pad 2024-10-15 17:29:51 +02:00
Kconfig
Makefile net: bridge: mst: Multiple Spanning Tree (MST) mode 2022-03-17 16:49:57 -07:00
br.c bridge: Convert br_net_exit_batch_rtnl() to ->exit_rtnl(). 2025-04-14 17:08:43 -07:00
br_arp_nd_proxy.c net: bridge: Prevent unicast ARP/NS packets from being suppressed by bridge 2025-04-09 19:13:43 -07:00
br_cfm.c bridge: cfm: remove redundant return 2021-06-22 10:35:15 -07:00
br_cfm_netlink.c bridge: cfm: fix enum typo in br_cc_ccm_tx_parse 2023-12-26 22:38:13 +00:00
br_device.c net: move misc netdev_lock flavors to a separate header 2025-03-08 09:06:50 -08:00
br_fdb.c rtnetlink: add ndo_fdb_dump_context 2024-12-10 18:32:32 -08:00
br_forward.c net: bridge: add skb drop reasons to the most common drop points 2024-12-23 10:11:04 -08:00
br_if.c net: bridge: keep ports without IFF_UNICAST_FLT in BR_PROMISC mode 2023-07-03 09:11:34 +01:00
br_input.c net: bridge: locally receive all multicast packets if IFF_ALLMULTI is set 2025-04-15 17:25:52 -07:00
br_ioctl.c net: Remove RTNL dance for SIOCBRADDIF and SIOCBRDELIF. 2025-03-21 22:10:06 +01:00
br_mdb.c net: bridge: mcast: Notify on mdb offload failure 2025-04-14 15:56:43 -07:00
br_mrp.c net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_mrp_netlink.c
br_mrp_switchdev.c bridge: mrp: Extend br_mrp_switchdev to detect better the errors 2021-02-16 14:47:46 -08:00
br_mst.c net: bridge: mcast: update multicast contex when vlan state is changed 2025-04-23 13:02:20 +01:00
br_multicast.c net: bridge: mcast: update multicast contex when vlan state is changed 2025-04-23 13:02:20 +01:00
br_multicast_eht.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
br_netfilter_hooks.c netfilter: br_netfilter: remove unused conditional and dead code 2025-01-19 16:41:52 +01:00
br_netfilter_ipv6.c netfilter: bridge: replace physindev with physinif in nf_bridge_info 2024-01-17 12:02:49 +01:00
br_netlink.c rtnetlink: Pack newlink() params into struct 2025-02-21 15:28:02 -08:00
br_netlink_tunnel.c net: bridge: fix an inconsistent indentation 2024-06-05 10:04:47 +01:00
br_nf_core.c net: dst: Switch to rcuref_t reference counting 2023-03-28 18:52:28 -07:00
br_private.h net: bridge: mcast: update multicast contex when vlan state is changed 2025-04-23 13:02:20 +01:00
br_private_cfm.h
br_private_mcast_eht.h net: bridge: multicast: use multicast contexts instead of bridge or port 2021-07-20 05:41:19 -07:00
br_private_mrp.h net: bridge: mrp: Update the Test frames for MRA 2021-06-28 15:46:10 -07:00
br_private_stp.h
br_private_tunnel.h bridge: always declare tunnel functions 2023-05-17 21:28:58 -07:00
br_stp.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
br_stp_bpdu.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
br_stp_if.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
br_stp_timer.c
br_switchdev.c net: bridge: mcast: Notify on mdb offload failure 2025-04-14 15:56:43 -07:00
br_sysfs_br.c net: bridge: constify 'struct bin_attribute' 2024-12-17 19:00:43 -08:00
br_sysfs_if.c bridge: move from strlcpy with unused retval to strscpy 2022-08-22 17:57:30 -07:00
br_vlan.c net: bridge: switchdev: do not notify new brentries as changed 2025-04-16 18:11:39 -07:00
br_vlan_options.c bridge: vlan: Allow setting VLAN neighbor suppression state 2023-04-21 08:25:50 +01:00
br_vlan_tunnel.c ip_tunnel: convert __be16 tunnel flags to bitmaps 2024-04-01 10:49:28 +01:00